thompson



2 Sheets-Sheet 1.

(No Model.)

J. THOMPSON.

' TRAVELING CRANE, DERRICK, &c.

No. 272,988. Patented Feb.27, 1883.

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(No Modl.) v 2 Sheets-Sheet 2.

.J. THOMPSON.

TRAVELING CRANE, DERRICK, &c.

No. 272,988. Patented Feb.2"7, 1883.

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UNITED STATES PATENT OFFICE.

JOHN THOMPSON, OF BUOYRUS, OHIO, ASSIGNOR TO THE BUOYRUS FOUNDRY ANDMANUFACTURING COMPANY, OF SAME PLACE.

TRAVELING CRANE, DERRICK, aw.

SPECIFICATION forming part of Letters Patent No. 272,9 88, datedFebruary 2'7, 1883.

Application filed January 17, 1883. (No model.)

To all whom it may concern:

Be it known that 1, JOHN THOMPSON, of the city of Bucyrus, county ofCrawford, and State of Ohio, have invented certain Improvements inTraveling Cranes, Derricks, and Similar Devices; and I hereby declarethe following to be a full, clear, and exact description thereof,reference being had to the accompanying drawings, making a part of thespecification, in which- Figure 1 is a horizontal sectional view of thelateral swinging mechanism of a traveling crane or similar device. Fig.2 is a vertical section on the line {I} a: of Fig. 1. Q

My invention relates to means for operating the chain-drums of travelingcranes, and has for its object to facilitate the handling of suchmachinery.

My invention consists of the details of construction of afriction-clutch mechanism and operating parts, as hereinafter fullydescribed,

wheel B. By this gearing, when wheel'A is revolved in one directionwheel B revolves in the opposite direction, and vice versa. The wheels AB are loose upon shaft 0, to which are keyed the chaindrumsa a, whichswing the crane-boom in their rotation. Between wheels A B, around shaft0, is a collar, D, having fourprojecting arms, t it t, which operatethrough turn-buckles h H, whose screws h h connect with arms 25 t andsliding friction-shoes G G by means of pin or ball-joints, fora purposehereinafter described. The shaft 0 is centrally bored from its end downto a point between wheels A B, where a slot, 8, (shown in Fig. 1,) iscut to the circumference. Within the central bore of shaft 0 is placed arod, 6, the inner end of which is secured to collar D by a key, It, sothat a reciprocation of rod 6 will move collar D back and forth on theshaft within the limits of the slots. A yoke, P, at the cndofshaft Gsupports a crank, W, which is connected to the outer end of rod 0 byalink, V, and the other arm of the crank, by means of connecting-rod Y,is connected to a lever, Z, having a toothed rack properly andconveniently located on the platform, whereby the operator canreciprocate rod e back and forth and change the position of collar D inrelation to wheels A B. As collar D is forced toward wheel B the armstit move the turn-buckles h H toward the face of the wheel D, and, movingas they do on their pin or ball-joints, they force outward thefrictionshoes G G, whose curved faces, coming in contact with theinterior surface of the rim of wheel D, clutch it to shalt C, so thatthe power through pinions L M N rotates the shaft and chain-drums in onedirection. By reversing the movement of rod 0 the clutches seize wheelAin a similar manner, and-pinion K and wheel A rotate shaft 0 in theopposite direction.

The faces of the'clutch-shoes G G may be covered with vulcanized fiberor any other desirable material.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a traveling crane or derrick, the power-shaft I, pinions K L M N,shaft 0, and loose wheels A B, in combination with collar D, providedwith arms t t, turn-buckles h H, and sliding friction-shoes G G, allconstructed, arranged, and operated as set forth.

2. The loose wheels AB, central hub or collar, D, provided with afriction clutching do vice in combination with the hollow slotted shaft0, rod 0, and operating crank and lever, substantially as'specified.

7 JOHN THOMPSON. Witnesses: FRANKN. ADAMS,

W. B. CRITTENDEN.

